Question

read the sentence.
the squirrel who ran in circles around the circumference of the tree chattered angrily at the curious cat.
which correctly revises the sentence?
the squirrel, who ran in circles around the circumference of the tree, chattered angrily at the curious cat.
the squirrel who ran in circles around the circumference of the tree, chattered angrily at the curious cat.
the squirrel, who ran in circles around the circumference of the tree chattered angrily, at the curious cat.
the squirrel who ran in circles around the circumference of the tree chattered angrily, at the curious cat.

Explanation:

A non - restrictive relative clause (which gives extra information about the squirrel) should be set off by commas. In the original sentence, “who ran in circles around the circumference of the tree” is non - restrictive (it just adds more details about the squirrel, not identifying a specific squirrel among many). So, it should be “The squirrel, who ran in circles around the circumference of the tree, chattered angrily at the curious cat.”

Answer:

The squirrel, who ran in circles around the circumference of the tree, chattered angrily at the curious cat.